Radial deformation of single-walled carbon nanotubes on quartz substrates and the resultant anomalous diameter-dependent reaction selectivity

Owing to the unique conjugated structure, the chemical-reaction selectivity of single-walled carbon nanotubes （SWNTs） has attracted great attention. By utilizing the radial deformation of SWNTs caused by the strong interactions with the quartz lattice, we achieve an anomalous diameter-dependent reac...

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Bibliographic Details
Published in:Nano research 2015-09, Vol.8 (9), p.3054-3065
Main Authors: Yang, Juan, Liu, Yu, Zhang, Daqi, Wang, Xiao, Li, Ruoming, Li, Yan
Format: Article
Language:English
Subjects:
Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Breaking down
Breathing
Carbon
carbonnanotubes,reaction
Chemical bonds
Chemistry and Materials Science
Condensed Matter Physics
Curvature
Deformation
Deformation mechanisms
Iodine
Lattices
Materials Science
Mathematical analysis
Nanotechnology
Nanotubes
Quartz
Raman spectroscopy
Research Article
Selectivity
selectivity,interaction,quartz
Single wall carbon nanotubes
single-walled
Strong interactions (field theory)
substrate,radial
Substrates
Tubes
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Summary:Owing to the unique conjugated structure, the chemical-reaction selectivity of single-walled carbon nanotubes （SWNTs） has attracted great attention. By utilizing the radial deformation of SWNTs caused by the strong interactions with the quartz lattice, we achieve an anomalous diameter-dependent reaction selectivity of quartz lattice-oriented SWNTs in treatment with iodine vapor; this is distinctly different from the widely reported and well accepted higher reaction activity in small-diameter tubes compared to large-diameter tubes. The radial deformation of SWNTs on quartz substrate is verified by detailed Raman spectroscopy and mappings in both G-band and radial breathing mode. Due to the strong interaction between SWNTs and the quartz lattice, large-diameter tubes present a larger degree of radial deformation and more delocalized partial electrons are distributed at certain sidewall sites with high local curvature. It is thus easier for the carbon--carbon bonds at these high-curvature sites on large-diameter tubes to break down during reaction. This anomalous reaction activity offers a novel approach for selective removal of small-band~aD large-diameter tubes.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-015-0811-1